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Home My WebLink AboutCT 98-12; MAGNOLIA GARDENS; ENVIRONMENTAL OBSERVATION AND TESTING; 2001-08-06r L r L ! l , r I ' [ RESULTS OF ENVIRONMENTAL OBSERVATION AND TESTING SERVICES DURING REMEDIAL EARTHWORK MAGNOLIA GARDENS, CARLSBAD TRACT 98-12 CITY OF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA FOR PACIFIC SCENE HOMES 2505 CONGRESS STREET, SUITE 220 SAN DIEGO, CALIFORNIA 92110 W.O. E2484-3-SC AUGUST 6, 2001 [ [ [ [ Geotechnical • Geologic • Envi ronmental 5741 Palmer Way • Carlsbad, California 92008 • (760) 438-3155 • FAX (760) 931 -0915 Pacific Scene Homes 2505 Congress Street, Suite 220 San Diego, California 92110 Attention: Mr. Dennis Ferdig August 6, 2001 W.O. E2484-3-SC Subject: Results of Environmental Observation and Testing Services During Remedial Earthwork, Magnolia Gardens, Carlsbad Tract 98-12, City of Carlsbad, San Diego County, California Dear Mr. Ferdig: As requested by Mr. Thad Jones (field superintendent with Pacific Scene Homes), GeoSoils, Inc. (GSI) is providing the following results of field observations and chemical testing of verification sampling during remedial grading of surface soils containing pesticide residues on the subject property. The purpose of our observations during remedial grading, conducted on August 2, 2001, was to observe removal of the upper ±one (1) foot of earth materials within an area of the project, where pesticide (i.e., Toxaphene) residue concentrations were previously detected above human health- based risk limits criteria (GSI, 1999b). Scope of Work Prior to the start of field work, onsite tailgate health and safety meetings were held on July 17 and 24, 2001 by GSI. All employees of the grading contractor (North County Asphalt, lnc.-Grading Division) working on the project site were in attendance, as well as Pacific Scenes' project superintendent Mr. Thad Jones. A site specific Safety and Health Plan (SHP), outlining the health and safety procedures to be used while performing the environmental remediation services were discussed, including the potential chemical and safety hazards and potential routes of exposure for each chemical hazard (GSI, 2001). For review purposes, the SHP is provided herein as Appendix B. GSI personnel observed the removal of the upper one (1) foot of earth materials over a one (1) acre area onsite, where Toxaphene residue concentrations were previously detected above human health-based risk limits criteria (GSI, 1999b). It was our understanding that the grading contractor located the area of remediation in the field, based on GSI (1996b). The area of remedial earthwork consisted of all or a portion of Lots 8 and 9 and Brady Circle (east), Stations 10+05± to 12+70±. Soils removed from this area were placed within an overexcavated portion of Brady Circle (south), Stations 13+ 70± to 15+90±. Limits of remedial earthwork are shown on Figure 1. Approximate elevations of the top of re mediated fill is presented on the enclosed map (Figure 1), which utilized a portion of the 40-scale plans for the project by Crosby Meade Benton Associates (December 12, 2000) as a base map. Elevations were generated from the adjacent survey control stakes. The remediated fill materials were placed at least five (5) feet below asphalt grades in street areas. At the conclusions of remedial earthwork, two (2) samples from the exposed earth materials were collected from hand auger holes (i.e., VS-1 and VS-2). Sample locations are shown on Figure 1. Samples were gathered and handled according to EPA standard procedures and immediately sealed, labeled, placed in a chilled ice chest and delivered to a California Department of Health Services (OHS) certified laboratory, accompanied by a Chain-Of-Custody Record. As per regulatory requirements, all samples were taken under the direct supervision of a California Registered Geologist. CHEMICAL ANALYSES Based upon the previous detected concentrations of agricultural chemical residues (GSI, 1999b), each soil sample was discretely tested for Chlorinated Pesticides utilizing EPA test method 8081 A. Chemical Test Results Test results reported no concentration of pesticides residues were detected within the samples above the laboratory detection limit. Chemical test results are presented in Appendix C. TABLE 1 SUMMARY OF CHEMICAL LABORATORY TEST RESULTS VS-1 ND111 VS-2 ND DIAL GOALS (PRGs) ·1k ?'..,U!1:~J,::;•/;1;f"'i.·.• 400 400 Note: ND <1> -Not detected above the laboratory reporting limit Pacific Scene Homes Tract 98-12, Carlsbad File:e:\wp7\env\e2400\e2484-3.roe GeoSoils, lne. W.O. E2484-3-SC August 6, 2001 Page2 \ \ . \ ) ) 1/ I I • ; I ,__x \ ~\1: I ::: I I < r . I I I. No Scale Al locations are approximate. I ,•-.-••-- •, '· .,/ \ ) --'i:!:'=r-,'=-=-='-'r ! 7 i I ! tAo1 1 7.,2 / i \ : ' I I . I \l Ip~. 1~~-t~ I I I ·' I I I i I i .-Z I rlo 1 yl l , I i . . /tl/t,,_ I j i : I s \ 1 157.5 B\l'ial \ ~ .- PAD 3• Verification Sampie· ·Location . . ,. X \ . \ -PERMISSION DA TEO__::~~~:.._..... . . .__ __ -_ _J~------\ In': Map reproduced from, "Gradng Plans for Magnolia Gardens," Sheet 3 of 5, dated 12-12-00, by Crosby. Meade Benton & Associates Remedal Earthwork Map for Soils With Pesticide Residues gnolia Gardens Development Carlsbad, C Carlsbad Tract 98-12 DATE 8-2001 ----------------- Geotechnical • Geologic • Environmental W.O. NO. E2484-3-SC fiQll'e 1 CONCLUSIONS AND RECOMMENDATIONS Based upon the scope of work completed, GSI presents the following conclusions and recommendations: • Residue concentrations of the previously detected pesticide Toxaphene were not detected above the laboratory detection limit of 100 µg/kg onsite. In addition, there were no residue concentrations detected of any of the parameters in the organochlorine pesticide suite above the laboratory detection limits. • Based upon field observations conducted by this office during remedial grading of one (1) area onsite, as well as chemical test results presented herein, soils with previously reported concentrations of pesticide residues detected above or human health-based risk limits criteria have been removed and buried within street areas. Based upon elevations and limits of the fill placed as a result of the subject remedial earthwork, surficial earth materials removed from the plot have been placed in areas which will mitigate the potential for future long-term human contact and/or contact with groundwater. Further studies or action are not proposed from an environmental viewpoint. LIMITATIONS The materials encountered on the project site and utilized in our evaluation are believed representative of the area; however, earth materials vary in character between excavations and natural outcrops or conditions exposed during mass grading. Site conditions may vary due to seasonal changes or other factors. GSI assumes no responsibility or liability for work, testing or recommendations previously performed or provided by others. Since our evaluation is based upon utilizing governmental references, site materials observed and selective laboratory testing, the conclusion and recommendations are professional opinions. These opinions have been derived in accordance with current standards of practice and no warranty is expressed or implied. Standards of practice are subject to change with time. Pacific Scene Homes Tract 98-12, Carlsbad File:e:\wp7\env\e2400\e2484-3.roe GeoSoils, lne. W.O. E2484-3-SC August 6, 2001 Page4 EPUJPF/jh Attachments: Distribution: Appendix A -References Appendix B -Health and Safety Plan Appendix C -Chemical Laboratory Test Results (3) Addressee (1) Pacific Scene Homes Onsite Superintendent Attn: Mr. Jones Pacific Scene Homes Tract 98-12, Carlsbad File:e;\wp7\env\e2400\e2484-3.roe GeoSoils, lne. W.O. E2484-3-SC August 6, 2001 Pages APPENDIX A REFERENCES APPENDIX A REFERENCES California, State of, Environmental Protection Agency, 1992, "Supplemental Guidance for Human Health Multimedia Risk Assessments of Hazardous Waste Sites and Permitted Facilities", chapter 8, "DDT in Soil" Guidance for the Assessment of Health Risk to Humans, dated July. County of San Diego, Environmental Health Services, 2000, Site assessment and mitigation (SNM), manual. GeoSoils, Inc., 2001, Safety and Health Plan for Sites with Potential for Exposure to Hazardous Agricultural Chemical Compounds, W.O. E2484-3-SC, dated July 16. __ , 2000, Second Addendum to 'Limited Phase I Environmental Site Assessment and Agriculture Chemical Residue Survey, Magnolia Gardens Development, City of Carlsbad, San Diego County,' W.O. E2484-SC, dated March 15, 1999, by GeoSoils, Inc. W.O. E2484-2-SC, dated April 4. __ , 1999a, Addendum to 'Limited Phase I Environmental Site Assessment and Agriculture Chemical Residue Survey, Magnolia Gardens Development, City of Carlsbad, San Diego County,' W.O. E2484-SC, dated March 15, 1999, by GeoSoils, Inc." W.O. E2484-2-SC, dated December 1. __ , 1999b, Limited Phase I Environmental Site Assessment and Agriculture Chemical Residue Survey, Magnolia Gardens Development, City of Carlsbad, San Diego County," W.O. E2484-SC, dated March 15. Smucker, Stanford J., United States Environmental Protection Agency (USEPA), 2000, Region IX, Region 9 Preliminary Remediation Goals (PRGs), October 1. GeoSoils, Inc. APPENDIXB HEALTH AND SAFETY PLAN GEOSOILS, INC. SAFETY AND HEALTH PLAN FOR SITES WITH POTENTIAL FOR EXPOSURE TO HAZARDOUS AGRICULTURAL CHEMICAL COMPOUNDS Project #: E2484-3-SC Client Name: Pacific Scene Homes Project Location: Magnolia Gardens Development, Carlsbad Tracts 98-12 & 00-05, Carlsbad, San Diego County, California Contact Person: Project Manager: Plan Preparer: Edward P. Lump Edward P. Lump Edward P. Lump CONTACTS (760) 438-3155 APPROVALS Preparation Date: 7-16-2001 Expiration Date: 8-16-2001 GeoSolls. Inc. Director of Environmental Services: Edward P. Lump, REA-1 25 Date l-.. J_ "\ _ O \ Grading Contractor Site Safety Officer: GeoSoils, Ine. - -------------------- ------ --------- 1.0 INTRODUCTION This Safety and Health Plan (SHP) outlines the health and safety procedures to be used while performing the environmental services described herein in Section 3.0. The anticipated hazards are identified in Section 4.0. If additional work is to be completed, this plan will be modified by the GeoSoils, Inc. (GSI) Safety and Health Coordinator or the Plan Reviewer to incorporate the changes or a new SHP will be developed. The safety procedures within this SHP can not be modified or altered by field personnel without clearance from the GSI Safety and Health Coordinator or the Plan Reviewer. This plan was developed with the best knowledge available at the time. If additional information becomes available or site conditions change, the SHP will be modified if necessary by the Safety and Health Coordinator or the Plan Reviewer prior to the continuation of field work. In the event that a subcontractor's SHP differs from this plan, the most restrictive SHP will be used after approval of the GSI Safety and Health Coordinator and/or the Plan Reviewer. The GSI Safety and Health Coordinator conducting the environmental training has completed the 40 hour hazardous waste training course as required by GSI policy and OSHA (29CFR 1910.120). The Site Safety Officer Q.e., Safety and Health Coordinator) will hold a site specific safety • meeting prior to start of work. During the site specific safety meeting the Site Safety Officer will discuss: potential chemical and safety hazards; potential routes of exposure for each chemical hazard; types, limitations, and proper use of Personal Protective Equipment (PPE); and proper decontamination procedures. The Site Safety Officer is also responsible for enforcing this site safety plan. All GSI personnel and its subcontractors who will work in the potentially contaminated areas of the site will read and agree to follow this SHP before performing any field work. This will be documented by having all personnel sign the attached Plan Acceptance Form. This SHP, a first aid kit, eye wash, telephone, and a fire extinguisher must be on site during all field activities described in Section 3.0. The emergency contacts and the Action Levels must be posted on site. 1 GeoSoils, lne. -------- ---- -------.... -------------- 2.0 BACKGROUND 2.1 Brief Site History Based upon review of historical photographs and maps of the subject property and vicinity, it appeared that the site was undeveloped from at least 1891 to sometime in the early 1920's (GSI, 1999b). Photographs from 1928/1929 note farmhouses/barns associated with orchards and cultivated land scattered throughout this portion of Carlsbad. Photographs from 1953 indicated that cultivated crops and orchards remained within the easterly and westerly property, respectively. The closest structures were visible along the southern boundary of the northern leg of the site, which was also developed with cultivated crops(and/or flowers?). Greenhouses were first detected onsite (along the northerly edge) in photographs from 1967, including what appeared to be a packing shed in the north central portion of the site. The western portion of the property appeared to consist of undeveloped land (northwestern half) and dense orchard trees (southwestern half). Photographs from 197 4 indicate property improvements similar to conditions onsite prior to demolition (i.e., storage/packing sheds, greenhouses, dirt roads, etc.). Greenhouses recently covered the majority of the project area, as well as the immediately adjacent property along the northern edge of the subject site (GSI, 1999b). Prior to demolition, vegetation noted onsite consisted of weeds and remnants of assorted ornamental flowers on Tract 98-12, with cultivated crops on Tract 00-05. Surface and subsurface irrigation lines, and abandoned electrical boxes were noted. Structures observed within Tract 98-12 also include an abandoned packing shed and cold storage unit, two wooden storage sheds with concrete flooring (labeled "Poison Storage Area"), what appeared to be a small locked wooden residential structure, and a mobile trailer. In addition to personal vehicles, a small rubber-tire tractor and trailer-mounted tank with spray apparatus were observed in the main compound. A small diesel-powered engine (i.e., compressor} was also noted in the compound area. One of the wooden storage sheds, located in the westerly portion of the property, was used as a residence. Assorted agricultural materials are stored in the compound area and inside the large packing shed, including metal and plastic drums, plastic buckets, and abandoned vehicles. Two small coolant compressors were observed at the western edge of the metal cold storage unit. Our assessment (GSI, 1999b), reported that the subject property (Gonzales Flowers, 1540 Magnolia Ave.) was listed in the County of San Diego Department of Environmental Health HE17 listing. Details provided in the database indicated that the listing was due to the storage of liquid nitrogen (fertilizer) and Daconil (restricted pesticide) on the property. The database reported that no violations were issued and the status was "unknown." A compliance inspection report, filed in 1991 for Gonzales Flowers (Bu·siness I.D. H99094) noted the inventory consisted of liquid nitrogen fertilizer. No other information was available. A request for public information from the Department of Agriculture, Weights and Measures, regarding available pesticide use records for Gonzales Flowers found no records for the two year period of 1997 and 1998. 2 GeoSoils, lne. ---------------- ----- --------------- As a part of the previous environmental assessment (GSI, 1999b), GSI interviewed the property foreman for the past 16 years, Mr. Anselmo Mendo. To the best of his knowledge, agricultural development onsite since 1982 consisted of flowers. Mr. Mende noted that the agricultural chemicals applied to the flowers were typically via spray mechanism within the greenhouses. Mr. Mendo noted that all pesticides/herbicides used on the property were kept in one locked wooden storage shed, which was labeled as a "Poison Storage Area." Chemicals were stored in a secure, wooden box inside the main shed in the central compound area (i.e., Tract 98-12). The entire storage shed was underlain by a concrete slab on grade. Mr. Mendo noted that, to the best of his knowledge, pesticides/herbicides were not stored in the small shed in the western portion of the property. With the aid of the property foreman (Mr. Mendo), a general inventory of containers stored in the aforementioned wooden box was made. Overall, the volume of containers observed ranged from 1 quart to 3 gallons. Generally, the containers observed stored only small amounts of their original volume, and in some cases were basically empty. Overall, there were 6 pesticide containers (labeled Dimethoate 400; Penncap-M; Pounce EC; Vydate L; Dipel 2X; and, Pyrenone) and 4 fungicide containers (labeled Daconcil 2787; Carbo-Vit; Terraclor; and Triforine EC). No obvious signs of unusual spills, significant staining of wood and.for concrete was detected. A mild but distinct odor was detected from the wooden storage box. Research of readily available references (see Appendix) did not locate data on two of the chemicals stored onsite (Carbo-Vrt and Pyrenone). Data on the remaining insecticides and fungicides indicated that overall, they are not chemically persistent in nature. Half-lives in soil were reported to range from two days to ten months. Aerobic and anaerobic biodegredation were reported to range from less than 1 to 70 days. EPA Toxicity Classifications ranged from Class I (highly toxic) to Class Ill (slightly toxic). Dipel and Dimethoate were listed as General Use Pesticides. Pevlous Scope of Work To evaluate the potential for restricted agricultural chemical residues onsite, surficial soil samples were collected from the upper 1 ½ feet of existing earth materials onsite. A total of 12 samples were collected from seven locations within the 5-acre site. All soil samples were tested for Chlorinated Pesticides and PCB's (EPA test method 8080), Chlorinated Herbicides (EPA test method 8150), and Organophosphorous pesticides (EPA test method 8140). Samples collected from the upper½ foot of soils in the greenhouses, in the compound area and near the storage sheds were also tested for Lead (EPA test method 6010). Samples collected from the compound area and near the western storage shed were tested for Total Petroleum Hydrocarbons-TPH (gas and diesel) and semi-volatile organic compounds (EPA test method 8270). Soil samples were not collected inside the storage sheds due to concrete slabs. Except for DDT, ODD, DOE, and Toxaphene, no constituents of the Chlorinated Pesticides -and PCB's were reported above the laboratory detection limits (i.e., non-detect). Toxaphene was detected in one sample (HA-5 at 0-½ feet) at a concentration of 1.04 3 GeoSoils, lne. -· ------------------------------------- milligrams per kilogram {mg/kg). Residual concentrations of Toxaphene were not detected in the underlying sample, HA-5 at ½ to 1½ feet. Concentrations of DDT total (i.e., DDT/DDE/DDD) were detected in 11 of the 12 samples, ranging from 0.0079 mg/kg to · 0.286 mg/kg. All constituents within the Chlorinated Herbicides and Organophosphorous Pesticides suite were not detected above the detection limits. Data collected indicate that concentrations of pesticides detected decrease with depth. For comparison purposes, regulatory levels for the characterization of hazardous waste (i.e., Total Threshold Limit Concentration) for DDT is 1.0 mg/kg and Toxaphene is 5.0 mg/kg. Preliminary Remedial Goals, which combine existing USEPA toxicity values with generally accepted exposure factors to estimate concentrations in residential soil that do not represent a cancer risk to humans greater than one-in-one million (i.e., 1 x 1 o~, are 1.7 mg/kg DDT and 0.4 mg/kg for Toxaphene. Test results for Lead in six of the seven samples were reported to range from 1.0 mg/kg to 19.0 mg/kg. Total Petroleum Hydrocarbons (gas and diesel) were reported less than detection limits (1 O mg/kg). With the exception of bis (2-Ethylhexyl) phthalate, reported in two samples at 0.072 mg/kg (HA-7) and 0.30 mg/kg (HA-6), no semi-volatile organic compounds were encountered above the detection limits. All chemical laboratory test results are presented in the referenced text (GSI, 1999b). Where applicable, GSI used existing regulatory data as a screening tool for the detected concentrations of pesticides and other contaminants within the property. Overall, concentrations of the contaminants detected onsite were found to be less than established criteria for a hazardous waste (Total Threshold Limit Concentration), and less than the criteria established as a potential risk to human health o.e., Preliminary Remedial Goals). Of exception is the single sample concentration of Toxaphene detected in HA-5 at 0-½ feet, reported at a concentration of 1.04 mg/kg, which is less than the hazardous waste criteria of 5 mg/kg, but greater than the potential human health risk value of 0.4 mg/kg. This sample concentration appears to represent an outlier, and not representative of site conditions. Review of regulatory site screening values o.e., Total Threshold Limit Concentration and Preliminary Remedial Goals) indicated that overall, no significant measures are needed to mitigate the residue concentrations of contaminants detected within the property. After review of our initial environmental report and limited survey by the County Department of Environmental Health (DEH), additional field work was requested. The purpose of the additional work (GSI, 1999a) was to provide information as requested by the San Diego County □EH-Voluntary Assistance Program in an October 12, 1999 DRAFT letter. In addition, the data submitted was based upon verbal conversations with Ms. Apecechea (project manager, DEH Site Assessment and Mitigation Program) on October 12 and November 5, 1999, as well as subsurface data collected from a boring drilled on the site on November 5, 1999. "Perched" groundwater was encountered within the terrace deposits at a depth of 20 to 27 ± feet, as well as at the terrace deposits/Santiago Formation contact, at a depth of approximately 33± feet. The boring was backfilled with a bentonite slurry (i.e., Enviroplug-medium). A groundwater sample was collected from the boring and 4 GeoSoils, Inc. ---------.. ---------------------------- transported to the California Department of Health Services (OHS) certified laboratory the same day, following proper procedures. Test results reported a Total Recoverable Petroleum Hydrocarbons (TRPH) concentration of 31.8 milligrams/liter (mg/I). Total Petroleum Hydrocarbons (TPH)-gas and TPH-diesel laboratory test results were reported as less than 0.05 mg/I and 0.5 mg/I, respectively. Concentrations of Benzene, Ethylbenzene, and Toluene were reported by the laboratory as less than 0.3 micrograms per liter (µg/I). Concentrations of Xylenes (Total) were reported by the laboratory as less than 0.6 µg/1. A MTBE concentration of 3.4 µg/I was reported. The PRGs for MTBE is listed (for tap water) as 20.0µg/l. Based upon the relatively low concentrations of TRPH and MTBE reported above, as well as the absence of detectable concentrations of TPH- gas and diesel, BTEX, Chlorinated Pesticides, and PCB's in the "perched" groundwater encountered on the property, it appears that agricultural operations on the property have not adversely affected "perched" groundwater. It is our opinion, therefore, that the initial survey report recommendations (GSI, 1999b) remain applicable. A third round of testing (GSI, 2000) was required by the County DEH in an October 12, 1999 DRAFT letter. Additional testing was also based upon verbal conversations with Ms. Apecechea (project manager, DEH Site Assessment and Mitigation Program). as well as chemical test data collected from hand auger borings drilled on the Magnolia Gardens II parcel (APN 205-220-12). Chemical test data was also collected from hand auger borings excavated through concrete slab core-holes in the two abandoned storage sheds on the original Magnolia Gardens parcel. There were no chemical constituents detected in the EPA 8140 test method suite. From the EPA 8080 test method suite, concentrations of DDT/DOD/ODE (i.e., DDT (Total)) were detected in nine (9) of the ten (10) samples collected, and Heptachlor Epoxide was detected in one (1) sample. Concentrations of DDT (Total) were reported to range from "less than detection limits" to 0.6125 mg/kg. For comparison purposes, regulatory action levels for hazardous waste criteria (i.e., Total Limit Threshold Concentration) for DDT (Total) is 1.0 mg/kg. All sample concentrations decreased with depth. Heptachlor Epoxide was detected at a concentration of 0.0005 mg/kg in sample HA-8 at ½afoot. From the EPA 8150 test method suite, 2,4,5-Twas detected in three (3) samples and 2,4-DB was detected in one (1) sample. Concentrations of 2,4,5-T was reported to range from "less than detection limits" to 0.0064 mg/kg. A concentration of 2,4-DB was detected at a level of 0.0089 mg/kg. All sample concentrations decreased with depth. Residue concentrations of DDT (Total), Heptachlor Epoxide, 2,4,5-T, and 2,4-DB detected in soil samples were compared to the PRGs for residential soil concentrations, which was reported as 1.7 mg/kg for DDT, 0.053 mg/kg for Heptachlor Epoxide, 490 mg/kg for 2,4- D8, and 61 o mg/kg for 2,4,5-T. Based upon the relatively low concentrations of agricultural chemical residues detected, it appeared that agricultural operations on the property have not generated significant agricultural chemical residues on the subject property. It was concluded, therefore, that the initial survey report recommendations remain applicable. 5 GeoSoils, Inc. --- ---- - --------------------.. -- --- 3.0 FIELD ACTIVITIES 3.1 Work Plan At the recommendation of the County Department of Environmental Health, surficial soils with concentrations of Toxaphene greater than the Preliminary Remedial Goal criteria should not be placed within five (5) feet of street subgrade within the right-of-way only, to mitigate the potential for human contact. Soils requiring remediation should not be placed in canyon bottoms or below subdrains, where there is potential contact with groundwater. . Affected soils should be buried within the property boundary only, and placed so as not to adversely affect surface water. GSI estimated that the upper one (1) foot of soil in an one-acre grid onsite will require remediation. Specifically, remedial earthwork is required in the area covering all of Lot 8, the western half of Lots 9, and Brady Circle (East) Station 10+00 to 12+80±. The estimated quantity of soils requiring remediation is on the order of 1, 110± cubic yards (yds3). Removals and burial should be monitored by a representative of this office. Sampling should be conducted at two (2) locations during grading (after removal of the affected earth materials onsite} to verify that all affected earth materials have been removed and buried. If detectable concentrations of restricted pesticides are encountered, additional removal would occur until earth materials with non-detectable concentrations are encountered. It is our opinion that preferential handling procedures are needed during the initial stage of brushing and grading of the project. These procedures may include, but may not be limited to indigent dust control with moisture conditioning,. weather monitoring, and personal protection for workers. Moisture conditioning is recommended during brushing and mass grading. Weather conditions should be monitored during the initial stages of grading on the level terrace area Limiting the brush and surficial soil removal during high wind conditions should be accomplished. All removal verification samples will be gathered and handled according to EPA standard procedures and immediately sealed, labeled, placed in a chilled ice chest and delivered to a California Department of Health Services (DHS) certified laboratory the same day, accompanied by a Chain-Of-Custody Record. As per regulation, all samples will be taken and logged under the direct supervision of a California Registered Geologist or Engineer. To prevent cross-contamination between sampling intervals, all equipment will be washed with a mild solution of tri-sodium phosphate (TSP), rinsed with clean tap water, and final rinsed with distilled water. 6 GeoSoils, lne. - -- ------- ------- --- ----------- - 3.2 Subcontractors to be Used ,2 ,:i ,-\, \.._ ( ~ )\,'='\ ~ ~ ~ \ \ :t "'<, . ~},. ~ "'"i ~ ~",.,, \"" "' GeoSoils, Ine. 7 ---- ----------------- --------... ------ 4.0 JOB HAZARD ANALYSIS Based on the previous agricultural use of the site as presented in the referenced reports on the subject site (Appendix), the chemicals listed below are known potential health hazards. Since a site safety plan addresses the "worst case11 situation, this plan addresses the health hazards of the compounds below with respect to worker safety, should these compounds be encountered. 4.1 Chemicals • DDT crota1> • Toxaphene 4.2 Physical Hazards • • • • • Heavy equipment operation . Becoming entwined in rotating tools . Brush, equipment, or gas-main fires . Exposure to excessive noise. Exposure to excessive outside temperatures (heat stress) . Physical hazards will be controlled by a combination of personal protective equipment (PPE) use and training of employees in safe and proper operation of equipment they will be using at the site. Subcontractors are responsible for the training of their employees in the proper use of their equipment. 4.3 Hazard Control Chemical Hazards There will be no eating, drinking, or smoking during remedial grading of the contaminated soils. During grading operations, personal protection {i.e., clothing) is not required, unless contaminated soils are being handled by individuals. Based upon previous laboratory test results and the chemical nature of agricultural residues, contamination onsite appears to be non-volatile; therefore air monitoring is not anticipated. Physical Hazards Operation of heavy equipment in excavation or other activities presents potential physical hazards to personnel. The following precautions should be observed whenever heavy equipment is in use: 8 GeoSoils, lne. --,,,. ------ ------------ --------------- • • • • • Personnel should at all times be aware of the location and operation of heavy equipment, and take precautions to avoid getting in the way of its operation. Never assume that the equipment operator sees you; make eye contact and use hand signals to inform the operator of your intent. Traffic safety vests are required for GSI personnel working near mobile heavy equipment, such as backhoes and other excavators. Never walk directly in back of, or to the side of, heavy equipment without the operator's knowledge. When an equipment operator must operate in tight quarters, the equipment subcontractor should provide a person to assist in guiding the operator's movements. Keep all non-essential personnel out of the work area . 9 GeoSoils, Inc. ----------.. ------------ -------------- 5.0 EMERGENCY CONTACTS AND PROCEDURES In case of any situation or unexpected occurrence which requires outside assistance or support, the proper contact from the following list should be made: Agency Name of Contact Telephone No. Ambulance Fire Police Hospital: 911 911 911 Tri-City Medical Center GSI Project Manager: Poison Control Center 4002 Vista Way Oceanside, CA 92056 (760) 724-8411 (Thomas Guide pg.1107, C2) Edward P. Lump Office: (760) 438-3155 Mobile: (760) 801-7090 (619) 543-6000 In the event of an emergency, call 911. GeoSoils, lne. 10 ---------------- --- - - --- - - ----- CHEMICAL RISK INFORMATION Name: DDT (total) Exposure and Explosive Limits: • • EXPOSURE LIMITS: CAL-OSHA 8 hour recommended exposure limit = 0.5 mg/m3 NIOSH 8 hour time weighted average = 0.5 mg/m3 NIOSH immediately dangerous to life or health concentrations (IDLH) = 500 mg/m3 NIOSH recommends the substance be treated as a suspected human carcinogen. EXPLOSIVE LIMITS: Not applicable Appearance and Odor: • • Colorless crystals or off-white powder with a slight aromatic odor . Pesticide . Symptoms: • • CONTACT: Convulsions, headache, fatigue, vomit. INHALATION/INGESTION: Irritation eyes and skin, apprehension, dizziness, confusion, malaise (vague feeling of discomfort). First Aid: • • • • EYE CONTACT: Immediately wash the eyes with large amounts of water, occasionally lifting the lower and upper lids. Seek medical attention immediately. SKIN CONTACT: Wash the contaminated skin with soap and water. If this chemical penetrates through the clothing, immediately remove the clothing, wash the skin with soap and water, and seek medical attention promptly. INHALATION: If a person breathes in large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform artificial respiration. Keep the affected person warm and at rest. Seek medical attention as soon as possible. INGESTION: Seek medical attention immediately. Reference: National Institute for Occupational Safety and Health (NIOSH), 1994, NIOSH Pocket Guide to Chemical Hazards, U.S.Dept. of Health and Human Services, dated June. 11 GeoSoils, Ine. -· -· ------ --------- ..... ------------ ------ Name: Toxaphene (I.e., Chlorinated camphene) Exposure and Explosive Limits: • • EXPOSURE LIMITS: CAL-OSHA 8 hour recommended exposure limit = 0.5 mg/m3 (skin) NIOSH immediately dangerous to life or health concentrations (IDLH) = 200 mg/m3 NIOSH recommends the substance be treated as a suspected human carcinogen. EXPLOSIVE LIMITS: Not applicable Appearance and Odor: • • Amber, waxy solid with a mild, piney, chlorine-and camphor-like odor . Insecticide . Symptoms: • • CONTACT: Skin (carcinogenic) . INHALATION/INGESTION: Nausea, confusion, agitation, convulsions, tremors, unconsciousness. First Aid: • • • • EYE CONTACT: Immediately wash the eyes with large amounts of water, occasionally lifting the lower and upper lids. Seek medical attention immediately. SKIN CONTACT: Wash the contaminated skin with soap and water. If this chemical penetrates through the clothing, immediately remove the clothing, wash the skin with soap and water, and seek medical attention promptly. INHALATION: If a person breathes in large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform artificial respiration. Keep the affected person warm and at rest. Seek medical attention as soon as possible. INGESTION: Seek medical attention immediately. Reference: National Institute for Occupational Safety and Health (NIOSH), 1994, NIOSH Pocket Guide to Chemical Hazards, U.S.Dept. of Health and Human Services, dated June. 12 GeoSoils, lne. - --------- - -- Employee Name Home Address ACCIDENT/EXPOSURE REPORT Sex: Male_ Female__ Job Title Date of Birth Phone No. S.S. No. Date of Hire Office No. Office Location Hours Usually Worked: Hours Per Day __ Hours Per Week __ Total Hours Weekly Where did accident or exposure occur? (Include address) County On employer's premises? Yes No -What was employee doing when injured? (be specific) ------ - - --- ------- How did the accident or exposure occur? (describe fully) What steps could be taken to prevent such an occurrence? Object or substance that directly injured employee Describe the injury or illness Name and address of physician If hospitalized, name and address of hospital Date of injury/illness Time of day Part of body affected Loss of one or more days of work? Yes/No If yes, date last worked Has employee returned to work? __ lf yes, date returned __ Did employee die? _If yes, date Com plated by (print) Signature Title Date An accident/exposure report must be completed by the supervisor or Site Safety Officer immediately upon learning of the incident. The completed report must be immediately transmitted to the office administrative manager and the GSI Safety and Health Coordinator. • 13 GeoSoils, lne. ----------------- - -------- - - - PLAN ACCEPTANCE FORM PROJECT HEAL TH AND SAFElY PLAN Instructions: This form is to be completed by all GSI and Pacific Scene Homes personnel to work on the subject project work site. Project No. Client/Property Owner/Developer: E2484-3-SC Pacific Scene Homes 2505 Congress Street, Suite 200 San Diego, California 9211 o I represent that I have read and understood the contents of the above plan and agree to perform my work in accordance with It. Signed Date Signed Date Signed Date 14 GeoSoils, lne. ------- - ------ --- --- ----- ----- SUBCONTRACTOR PLAN ACCEPTANCE FORM The following subcontractors have been hired to perform work during this operation. All employees of subcontractors hired to perform work with the potential for exposure to the above mentioned contaminants have been notified of and understand the chemical risks. Address: Authorized Representative: Services Provided: Excavation and Grading Services Signa~ _--,,,,.___ Date ~d1 • Signature~~ Signature .ytJ {?, ~~ Date ~;,._4(o I Signature Date ~-Z't-0/ Date 7 _ -z.--'-/-0 1 Signature Date Signature Date Signature Date Signature Date, Signature Date 15 GeoSoils, Inc. ---------- --- ---------- --- -------- APPENDIX REFERENCES California, State of, Environmental Protection Agency, 1992, 11Suppleniental Guidance for Human Health Multimedia Risk Assessments of Hazardous Waste Sites and Permitted Facilities", chapter 8, "DDT in Soi111 Guidance for the assessment of health risk to humans, dated July. County of San Diego, Environmental Health Services, 2000, Site assessment and mitigation (SNM), manual, dated January 20. GeoSoils, Inc., 2000, Second Addendum to, nlimited Phase I Environmental Site Assessment and Limited Agricultural Chemical Residue Survey; Magnolia Gardens Development, City of Carlsbad, San Diego County, California.'' W.O. E2484-2-SC, dated April 4. __ , 1999a, Addendum to, n Limited Phase I Environmental Site Assessment and Limited Agricultural Chemical Residue Survey, Magnolia Gardens Development, City of Carlsbad, San Diego County, California.U W.O. E2484-2-SC, dated December 1. __ , 1999b, Limited Phase I Environmental Site Assessment and Limited Agricultural Chemical Residue Survey, Magnolia Gardens Development, City of Carlsbad, San Diego County, California, W.O. E2484-SC, by GeoSoils, Inc., dated March 15. __ , 1998, Preliminary Geotechnical Evaluation, Magnolia Gardens Development, City of Carlsbad, California, W.O. 2484-A-SC, dated August 7. Mackay, D., Shiu, W., Ma, K., 1997, Illustrated Handbook of Physical-Chemical Properties and Environmental Fate for Organic Chemicals, volume V, Pesticide Chemicals, Lewis Publishers, CRC Press LLC. Oregon State University, 1995-1996 revisions, The Extension Toxicology Network (EXTOXNEl), electronic files in cooperative effort with Univ. Of Calif.-Davis, Michigan State Univ., Cornell Univ., and Univ. Of Idaho. Smucker, Stanford J., United States Environmental Protection Agency (USEPA), 2001, Region IX, Region 9 Preliminary Remediation Goals (PRGs), dated November 1. 16 GeoSoils, lne. C C C I I I C C C C C C- C I I I I C C APPENDIXC CHEMICAL LABORATORY TEST RESULTS ---- .... f,.alscience ~ ... , -6==11vironmental Laboratories, Inc. --August 03, 2001 ---Ed Lump Geosoils -57 41 Palmer Way -Carlsbad,CA 92008-7248 -Subject:Calscience Work Order No.: 01-08-0141 ----------------------- Client Reference: GS080201-12/82484-3-SC Dear Client: Enclosed is an analytical report for the above-referenced project. The samples included in this report were received 8/3/2001 and analyzed in accordance with the attached chain-of-custody. Unless otherwise noted, all analytical testing was accomplished in accordance with the guidelines established in our Quality Assurance Program Manual, applicable standard operating procedures, and other related documentation. The results in this analytical report are limited to the samples tested and any reproduction thereof must be made in its entirety. If you have any questions regarding this report, require sampling supplies or field services, or information on our analytical services, please feel free to call me at (714) 895-5494. a s • ce Environmental Laboratories, Inc. Robert Stearns Project Manager Michael J. Crisostomo Quality Assurance Manager 7440 Lincoln Way, Garden Grove, CA 92841-1432 • TEL: (714) 895-5494 • FAX: (714) 894-7501 ---&,;a/science ANALYTICAL REPORT --I ,!JVironmental Laboratories, Inc. • Geosoils • 5741 PalmerWay Carlsbad,CA 92008-7248 ---Project: GS080201-12/82484-3-SC -Client Semple Number: Lab Sample Number: -vs-1 : ... : .. :,·::.. ,,,."::. ,, . · • .01~-~.141:~1 ·: ·'·:. · ·: .. .. . _..--::i~. :·: ... '· ! . . . -Pari!M!l!~r Result Bl,, l2f S&il ~ -Alpha-BHC ND 5.0 1 ug/kg -Gamma•BHC ND 5.0 1 uglkg Beta-BHC ND s.o 1 ug/kg -Heptaehlor NO 5.0 1 ug/kg Delta-BHC ND 5.0 1 ug/kg Aldrin ND 5.0 1 ug/kg -Heplachlor Epoxlde ND 5.0 1 ug/kg -Endosulfan I ND 5.0 1 ug/kg Dleldrtn ND 5.0 1 ug/kg 4,4'-DOE ND 5.0 1 ug/kg - §!JrrQQ!lleS: REC(0d!} Control Qual -Limi!S Decachlorobiphenyt 146 50-130 2 -_ I VS-2 -Parameter Result RL OF Quel Units -·Atpha~HC ND 5.0 1 ug/l<g Gamma-BHC ND 5.0 1 ug/l<g -Beta-BHC NO 5.0 1 uglkg HeptaCl'llor ND 5.0 1 ug/kg -Delta-BHC ND 5.0 1 ug/kg Aldrin NO 5.0 Ug/kg -Heptachlor Epoxide ND 5.0 ug/kg Endosulfan I NO 5.0 1 Ug/1<9 -Dieldrin ND 5.0 1 uglkg 4,4'-DDE ND 5.0 1 ug/kg -S!Jrrooatel!: BEC (0t1l .c.m!m!. Qual -Limits Oecachlorobiphenyl 136 50·130 2 ------RL • Reporting Limit , OF • Dilution Factor , Qual • Quallflers - Date Received: Work Order No: Preparation: Method: Date Collected: Matrix: Date Date Prepared: Analyzed: 08/03/01 01-08-0141 EPA3545 EPA 8081A Page 1 of 2 QC Balch ID: • '• ''' .: ', '••,•• • • •' ',',,• I • ' •• • ' '• ' •• • '' · -_oa,02101, .. : • ·:· r._-.s~H~·-·.·: '.:· \ ·,;~81~1: • .: :_-. . _!)8:(~.3f:~1-· • t: p10.ao25·:_.,: ·; • Pi!rameter Result Bb OF Qual Units Endrin ND 5.0 1 ug/kg Endrin Aldehyde ND 5.0 1 ug/kg 4,4'•ODO ND 5.0 1 ug/kg Endosulfan II ND 5.0 1 ug/kg 4,4'..0DT ND 5.0 1 ug/kg Endosulfan Sulfate ND 5.0 1 ug/kg Methoxychlor ND 5.0 1 ug/kg Chlordane ND 50 1 ug/kg Toxaphene ND 100 1 Ug/kg Endrin Ketone NO 5.0 1 ug/kg SytrQQillflli; B!;Q (D/q} Control Qual Limits 2,4,5,B•Tetrachloro-m-Xytene 85 50-130 Parameter ~ Bl,. QE Qua! ~ Endrin ND 5.0 1 ug/kg Endrln Aldehyde ND 5.0 1 ug/kg 4,4'-D00 NO 5.0 1 ug/kg Endosulfan II ND 5.0 1 ug/kg 4,4'-DDT ND 5.0 1 ug/kg Endosulfan Sulfate NO 5.0 1 ug/kg Melhoxychlor ND 5.0 1 ug/kg Chlordane ND. 50 1 ug/kg Toxaphene ND 100 1 ug/kg endrln Ketone NO s.o 1 ug/kg Surrogates: REC{%} Control Qual Limits • 2.4,5,IHelrachloro-m-Xylene 80 50-130 7440 Lincoln Way, Garden Grove, CA 92841-1432 • TEL: (714) 895-5494 • FAX: (714) 894-7501 - ---------------------- ..... - ---------- -- &:;;a/science f pvironmental l,.aboratories, Inc. Geosoils 57 41 Palmer Way Carlsbad,CA 92008-7248 Project: GS080201-12/82484-3-SC Client Sample Number: :· Mattioct'31arik,~ . ··:,.. ,· · Parameter Bml!! Bb Alpha-BHC NO 5.0 Gamma,.BHC ND 5.0 Beta-BHC ND 5.0 Heptamlor ND 5.0 Dalta-BHC ND 5.0 Aldrin ND 5.0 Heptachlor EpOXide ND 5.0 Endosulfan I ND 5.0 Dieldrin NO 5.0 4,4'-DDE ND 5.0 Surcogate,G; B!iQ (2fil ~ Limits Decaehlorobiphenyl 129 50-130 ANALYTICAL REPORT Date Received: Work Order No: Preparation: Method: Lab Sample Date Date Date 08/03/01 01-08-0141 EPA 3545 EPA 8081A Page 2 of 2 Number. Collected: Matrix: Prepared: Analyzed: QC Batch ID: OF Qual Units Parameter ~ fil. DF Qu3I Moil! 1 Ug/kg Endrin NO 5.0 1 ug/kg 1 ug/kg Endrin Aldehyde ND 5.0 1 ug/kg 1 ug/kg 4,4'-DDD NO 5.0 1 ug/kg 1 ug/kg Endosulfan II ND 5.0 1 ug/kg 1 Ug/l(g 4,4'-DOT ND 5.0 1 ug/kg 1 ug/kg Endosulfan Sulfate ND 5.0 1 ug/kg , ug/kg Methoxychlor ND 5.0 1 ug/kg 1 ug/kg Chlordane ND 50 1 ug/kg 1 ug/kg Toxaphene ND 100 1 ug/kg 1 ug/kg Endrln Ketone ND 5.0 1 ug/kg Q!!i! Surrogates: REC[%} Control aual Limits 2,4,5,8-Tetrachloro-m-Xylene 86 50.130 RL • Reporting Limit , OF • Ollullon Factor , Qual -Qualifiers 7440 Lincoln Way, Garden Grove, CA 92641-1432 • TEL: (714) 895-5494 • FAX: (714) 894-7501 --------------------- ..... ------------ --- Laiscience GLOSSARY OF TERMS AND QUALIFIERS ~ ~pvironmental Laboratories, Inc. Work Order Number: 01-08-0141 Qualifier 2 ND Definition Surrogate spike compound was out of control due to matrix interference. The associated method blank surrogate spike compound was in control and, therefore, the sample data was reported without further clarification. Not detected at indicated reporting limit. 7440 Lincoln Way, Garden Grove, CA 92841-1432 • TEL: (714) 895-5494 • FAX: (714) 894-7501 I 0 ;:, n I I I 11 II 111 f f 1 I J 1111 II I j I Chain of Custody Record Transglobal Environmental Geochemistry 432 N. Cedros Avenue (ov~, Solana Beach. CA 92075 (858) 793-0401 Fax: (858) 793-0404 I lcJ/Jr'u,). J_,0 1 G: ~ r//:2. TEG Project # : ::..I'~ "c'oZ d, - Outside Lab: Client: ~~ \~;\~"~n,~ . Date: \\.~~ • "l.. .. L-~ ~ \ Page I Of I Address: > "\. '-\)i ~ ~ ~'-'-\.,21 ~~ Client Project #~~\')'-':·:-~-1 (_ Project Manager:~ t.\ l v\>-f c...~<"\.:l'o~"~ J '-~ ~·:~{l.--~ ,~~!) 1 Location: Date of Collection: 1 '·'L.. '·,, \ Phone:C>,~0'-\\~ -1·, s)-Fax:~~)~')\--~P\\5 Collector: ~,{ C" ""'-D "\ ~ "' II .!!! .s -0 x w t\l "ij ~ 0 ID CD "' u, "' w I-0 0 IQ II> ,a I-CD 0 r--~ e ~ .... N ...,, ~ e .... l N ~ nl co CD Q) 0 U) IO U'> 0 0 0 0 ...I 'tJ 0 0 -..... N N .... co ~ .... "' 0 0 0 0 .... N <"I 0 Q) «> Cl co co CD CD ::c co CD ·c _. !!l Sample Container < :c J: J: i < 0.. (I) (.) ·e ~ ... ~ ... Sample# Deplh Time Dale Type Type 0 D. C. D. g a: w 0 II> e> ~ al Field Noles > t-I-... > t-\.O...~ > (I) Q. 0 :!: ~S--\ -\1~ '"--~ ~-i\~\ Sc~\ G-\~.sr I'\ \J $ -'2--\\\;. 2"'Jf0 "e( 2.l,' ~-~ ~, G--\o.s, r\_ Relinquished by: (signature) Dale/Time Received by: (signature) D~?cW Total ,; of containers: :·L Notes: U-~~,__4~~~ 8-:2-~0J._ii;:~2.~; m. ~~-· 'l'_/2A ¥ ~ 1 Chain of Custody seals YIN/NA t0 xa.,phe,1.c Seats intact? V/NJNA ·-~~"It DfJT Relinquished by: (signature, Dale I Time Dale /Time <2hk, Received good condit,on/cold 11rn Turn around time: c:,/~ i£, A I ,I r I --I -,-- Sample disposal instructions: ,X-TEG Disposal@ $1.W ~sch _ Return to clien, _ P;ckup I I ~ QI C: ~ C: 0 u 0 'It "' j§ ' ' I I I I f ' I .I I I I } ' I ,I I I I I I I 1 I I I I I I I I I I .1 r .. I I I I ~ Transglobal Environmental Geochemistry Chaitt of Custody Record TEG Project# : , , - 432 N. Cedros Avenue ., ~ Solana Beach, CA 92075 Outside Lab: (858) 793-0401 Fax: (858} 793-0404 Client: __ {_,._>_-_:.:_.;.:._• ·..:.·~-_ .... :-_,,,,,..· '-'·-~.:...; ....:.:c::=~:::.-·.;..<·_·-_:___;;_ ___________ _ Address: ..;:;,· J.,\.,,J., '\ (,;; !.-\·~-~-1..::,.....) \,,.,.,"-• } 1\ '-" -, 1 . , l ! Date: \ ""'')¥~ ....... ,, -~\) · Page _! . Of __ _ Client Project#: tJ...'\\'-A:· ~.,-f C Project Manager:~ v\ L d,£"/' \ Location: ~----~---------------....-.------,,--- Collector: ~J l "-) ··"'4,. n Date of Collection: '-;,s • ·:.;~~-v .\ ' Q) (/) Sample# .-Sample.· , • = Container Depth Time Date Type•.,, : • Type Q) -~ r .!:: "O >< w C\I (I) 0 Q) ca m 00 .!::: U) w 0 0 <II (/) Q) (/) ~ I-CD 0 r-.. c "' ~ "' ~ r-.. N "O ' ~ ~ ~~ 1: N g,? <II 0 CD. Q) 0 0 "' "' "' 0 0 0 0 ..J "O 0 0 -0 0 N N CD ~ M l'D 0 0 0 N 0 Q) :it CX) 00 CX) 00 CX) 00 00 CX) ·2 ..J !!l <( :c :c :c <( ~ o.. en (.) .E <( l'D iii nl <II 0 0.. 0.. 0.. 0 a:: w g (l) z e> ~ G) Field Notes ~ > I-I-I-> > I-.. -en 0.. 0 ~ .. \. \ ~, l .. -,. . , -· ...... ,,. , .;. ~ ,. "'·} ·'T'·.~--;' .;._,. t Relinquished by: (signature) Date I Time Received by: (signature) .Date I Tjme Total # of containers: -Notes: ... . ' ~ . , t , •:•t ~<-~/?\~~:,:A•~. i Relinquished by: (signature) Date I Time ,;' Received by: (signature) Date I Time Chain of Custody seals YIN/NA ~: ! Seals intact? Y/N/NA ,, ·; .. Received good condition/cold I i l i \' ,t' ~ ·' Turn around time:---·~,,-·.,_/""""""_ Sample disposal instructions: k TEG Disposal@ $2.00 each Return to client _ Pickup